General Announcement::Final_Report_Completion_of_Restoration_Following _Service_Outage_on_IBIDEN s_Website

Issuer & Securities

Announcement Title: General Announcement
Date &Time of Broadcast: 28-Apr-2026 16:39:37
Status: New
Announcement Sub Title: Final_Report_Completion_of_Restoration_Following _Service_Outage_on_IBIDEN s_Website
Announcement Reference: SG260428OTHR8C80
Submitted By (Co./ Ind. Name): Yasuhito Hirose
Designation: Senior Manager,Corporate Planning Division Manager
Effective Date and Time of the event: 28/04/2026 17:00:00
Description (Please provide a detailed description of the event in the box below): IBIDEN CO., LTD. sincerely apologizes for the significant inconvenience and concern caused to our customers and all other stakeholders in relation to the service outage that occurred on our corporate website on April 13, 2026.Following the incident, our website had been operated under a provisional environment. We are pleased to inform you that verification of the website s security has now been completed and that the website has been fully restored and returned to normal operation. Accordingly, we hereby provide a final report outlining the results of our investigation and the measures implemented to
prevent recurrence.

Total size =91K